The damage of ladle refractory, which mainly occurs at the position of the slag line, results in an increasing need of maintenance and repair and can, in the worst case, lead to a breakout of melts causing potential risks for the personnel and damage of equipment. On the basis of this fact, the corrosion behavior of MgO–C refractory in contact with molten slag during the steel refining process is experimentally studied in this work. Rotating and static dipping tests of MgO–C refractory in CaO–SiO₂–Al₂O₃–MgO–FeO slags are conducted, and the effects of composition of slag, carbon in refractory, and rotation speed on the corrosion behavior are investigated. Results show that the corrosion depth of the MgO–C refractory increases with FeO content of slag and rotation speed of MgO–C rod, whereas it decreases with an increase in slag basicity. Slag notably penetrates the surface layer of MgO–C refractory after the carbon is oxidized, causing an aggravation of the corrosion. Moreover, the corrosion mechanism of MgO–C refractory in molten slag during the refining process is studied and illustrated in this work.

中文翻译：

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熔渣对MgO-C钢包耐火材料的腐蚀行为

钢包耐火材料的损坏主要发生在炉渣生产线的位置，导致维护和修理的需求增加，在最坏的情况下，可能导致熔体破裂，对人员和设备造成潜在的风险并损坏设备。基于这一事实，在这项工作中，通过实验研究了MgO-C耐火材料在炼钢过程中与熔融炉渣接触的腐蚀行为。CaO-SiO ₂ -Al ₂ O ₃中MgO-C耐火材料的旋转和静态浸渍试验进行了–MgO–FeO炉渣，研究了炉渣成分，耐火材料中的碳以及转速对腐蚀行为的影响。结果表明，MgO-C耐火材料的腐蚀深度随炉渣中FeO含量和MgO-C棒转速的增加而增加，而随炉渣碱度的增加而减小。碳被氧化后，炉渣会特别渗入MgO-C耐火材料的表层，从而加剧腐蚀。此外，这项工作还研究和说明了精炼过程中熔渣中的MgO-C耐火材料的腐蚀机理。